// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
#define CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_

#include "content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.h"

#include "ui/gfx/native_widget_types.h"

namespace content {

class GpuOutputSurfaceMac
    : public GpuSurfacelessBrowserCompositorOutputSurface {
public:
    GpuOutputSurfaceMac(
        gfx::AcceleratedWidget widget,
        scoped_refptr<ui::ContextProviderCommandBuffer> context,
        gpu::SurfaceHandle surface_handle,
        const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
        std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
            overlay_candidate_validator,
        gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager);
    ~GpuOutputSurfaceMac() override;

    // cc::OutputSurface implementation.
    void SwapBuffers(cc::OutputSurfaceFrame frame) override;
    bool SurfaceIsSuspendForRecycle() const override;

    // BrowserCompositorOutputSurface implementation.
    void OnGpuSwapBuffersCompleted(
        const std::vector<ui::LatencyInfo>& latency_info,
        gfx::SwapResult result,
        const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) override;
    void SetSurfaceSuspendedForRecycle(bool suspended) override;

private:
    gfx::AcceleratedWidget widget_;

    // Store remote layers in a separate structure, so that non-Objective-C files
    // may include this header.
    struct RemoteLayers;
    std::unique_ptr<RemoteLayers> remote_layers_;

    enum ShouldShowFramesState {
        // Frames that come from the GPU process should appear on-screen.
        SHOULD_SHOW_FRAMES,
        // The compositor has been suspended. Any frames that come from the GPU
        // process are for the pre-suspend content and should not be displayed.
        SHOULD_NOT_SHOW_FRAMES_SUSPENDED,
        // The compositor has been un-suspended, but has not yet issued a swap
        // since being un-suspended, so any frames that come from the GPU process
        // are for pre-suspend content and should not be displayed.
        SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED,
    };
    ShouldShowFramesState should_show_frames_state_ = SHOULD_SHOW_FRAMES;

    DISALLOW_COPY_AND_ASSIGN(GpuOutputSurfaceMac);
};

} // namespace content

#endif // CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
